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  <title>Dumps the internal XML tree back into a file</title>
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  <div id="layout-content"><div id="domdocument.save" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">DOMDocument::save</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">DOMDocument::save</span> &mdash; <span class="dc-title">
    Dumps the internal XML tree back into a file
  </span></p>

 </div>
 <div class="refsect1 description" id="refsect1-domdocument.save-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>DOMDocument::save</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$options</code><span class="initializer"> = 0</span></span>): <span class="type"><span class="type">int</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   Creates an XML document from the DOM representation. This function is usually 
   called after building a new dom document from scratch as in the example below. 
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-domdocument.save-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">filename</code></dt>

     <dd>

      <p class="para">
       The path to the saved XML document.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">options</code></dt>

     <dd>

      <p class="para">
       Additional Options. Currently only <a href="libxml.constants.html" class="link">LIBXML_NOEMPTYTAG</a> is supported.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-domdocument.save-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the number of bytes written or <strong><code>false</code></strong> if an error occurred.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-domdocument.save-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-5407">
    <p><strong>示例 #1 Saving a DOM tree into a file</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /><br />$doc&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">DOMDocument</span><span style="color: #007700">(</span><span style="color: #DD0000">'1.0'</span><span style="color: #007700">);<br /></span><span style="color: #FF8000">//&nbsp;we&nbsp;want&nbsp;a&nbsp;nice&nbsp;output<br /></span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">formatOutput&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">true</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$root&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">createElement</span><span style="color: #007700">(</span><span style="color: #DD0000">'book'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$root&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">appendChild</span><span style="color: #007700">(</span><span style="color: #0000BB">$root</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$title&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">createElement</span><span style="color: #007700">(</span><span style="color: #DD0000">'title'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$title&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$root</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">appendChild</span><span style="color: #007700">(</span><span style="color: #0000BB">$title</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$text&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">createTextNode</span><span style="color: #007700">(</span><span style="color: #DD0000">'This&nbsp;is&nbsp;the&nbsp;title'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$text&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$title</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">appendChild</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">);<br /><br />echo&nbsp;</span><span style="color: #DD0000">'Wrote:&nbsp;'&nbsp;</span><span style="color: #007700">.&nbsp;</span><span style="color: #0000BB">$doc</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">save</span><span style="color: #007700">(</span><span style="color: #DD0000">"/tmp/test.xml"</span><span style="color: #007700">)&nbsp;.&nbsp;</span><span style="color: #DD0000">'&nbsp;bytes'</span><span style="color: #007700">;&nbsp;</span><span style="color: #FF8000">//&nbsp;Wrote:&nbsp;72&nbsp;bytes<br /><br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-domdocument.save-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="domdocument.savexml.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::saveXML()</a> - Dumps the internal XML tree back into a string</span></li>
    <li class="member"><span class="methodname"><a href="domdocument.load.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::load()</a> - Load XML from a file</span></li>
    <li class="member"><span class="methodname"><a href="domdocument.loadxml.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::loadXML()</a> - Load XML from a string</span></li>
   </ul>
  </p>
 </div>

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